NUMERICAL STUDY OF AMMONIA DECOMPOSITION DIFFUSION COMBUSTION CHARACTERISTICS AND KINETICS ANALYSIS OF NO EMISSION

• Main Author: Walad, Khoeril
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/87361
• Institution: Institut Teknologi Bandung

Ammonia is considered one of the most promising non-carbon fuels as a future energy source. However, ammonia has several disadvantages including reactivity problems and low combustion velocity. Ammonia decomposition is one solution to overcome these problems. Ammonia decomposition produces hydrogen and nitrogen, where hydrogen can help improve ammonia combustion characteristics. The purpose of this study is to determine the combustion characteristics including flame profile, temperature, heat of reaction and NO emissions by varying the independent variables including ammonia decomposition fraction, fuel flow turbulence level and air temperature. The methodology used in this study is a numerical method using FLUENT software. The turbulent approach utilized in this study is Reynolds-Averaged Navier-Stokes (RANS) and the combustion model utilized is Eddy Dissipation Concept (EDC). The results showed that the temperature and heat of reaction increased with increasing NH3 decomposition fraction and fuel Reynolds number. In addition, the increase in these two variables has an impact on reducing NO combustion emissions. Increasing air temperature affects the increase in combustion temperature but the heat of reaction tends to decrease. In terms of NO emissions, increasing air temperature has a tendency to increase NO emissions.